Emulsion-char method for making fine powder
US4654075A · kind A · utility
22Cited by
5References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1985 |
| Grant date | Mar 31, 1987 |
| Priority date | — |
| Expiry date | Jun 17, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/52
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Water soluble precursors of ceramic compounds are emulsified in an organic fluid that is subsequently heated to remove the free water from the emulsion droplets and further heated in a partial oxygen atmosphere to form a char. The carbon in the char maintains the separation between the dried droplet-derived particles. This char may then be heated in air to oxidize and remove the carbon, to calcine the ceramic, and to controllably produce a fine powder of spherical particles having a narrow size distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.